In open water, you’d be able to handle fish of that size on the ML. But if you’ve got docks or mangroves to compete with, step up to the M. Then again, the weight of your lure comes into play of course.
I’ve never used the E6X but I can say that the St Croix Avid Inshore also warrants a look. Mine have tamed many reds, trout, flounder, etc on both the FL Panhandle and the SC Lowcountry